Drop support for older Barback versions.

test/transformer/multiple_transformers_reject_their_config_test.dart

Index: test/transformer/multiple_transformers_reject_their_config_test.dart
diff --git a/test/transformer/multiple_transformers_reject_their_config_test.dart b/test/transformer/multiple_transformers_reject_their_config_test.dart
index 52efcdbfd71283dc8d8a747410fa7ffa886554aa..0b1422d806cee8ad58710f21ae149a2fa8074cc6 100644
--- a/test/transformer/multiple_transformers_reject_their_config_test.dart
+++ b/test/transformer/multiple_transformers_reject_their_config_test.dart
@@ -27,33 +27,31 @@ class RejectConfigTransformer extends Transformer {
 """;
 
 main() {
-  withBarbackVersions("any", () {
-     integration("multiple transformers in the same phase reject their "
-         "configurations", () {
-       d.dir(appPath, [
-         d.pubspec({
-           "name": "myapp",
-           "transformers": [[
-             {"myapp/src/transformer": {'foo': 'bar'}},
-             {"myapp/src/transformer": {'baz': 'bang'}},
-             {"myapp/src/transformer": {'qux': 'fblthp'}}
-           ]]
-         }),
-         d.dir("lib", [d.dir("src", [
-           d.file("transformer.dart", REJECT_CONFIG_TRANSFORMER)
-         ])])
-       ]).create();
-
-       createLockFile('myapp', pkg: ['barback']);
-
-       // We should see three instances of the error message, once for each
-       // use of the transformer.
-       var pub = startPubServe();
-       for (var i = 0; i < 3; i++) {
-         pub.stderr.expect(consumeThrough(endsWith('Error loading transformer: '
-             'I hate these settings!')));
-       }
-       pub.shouldExit(1);
-     });
-  });
+    integration("multiple transformers in the same phase reject their "
+        "configurations", () {
+      d.dir(appPath, [
+        d.pubspec({
+          "name": "myapp",
+          "transformers": [[
+            {"myapp/src/transformer": {'foo': 'bar'}},
+            {"myapp/src/transformer": {'baz': 'bang'}},
+            {"myapp/src/transformer": {'qux': 'fblthp'}}
+          ]]
+        }),
+        d.dir("lib", [d.dir("src", [
+          d.file("transformer.dart", REJECT_CONFIG_TRANSFORMER)
+        ])])
+      ]).create();
+
+      createLockFile('myapp', pkg: ['barback']);
+
+      // We should see three instances of the error message, once for each
+      // use of the transformer.
+      var pub = startPubServe();
+      for (var i = 0; i < 3; i++) {
+        pub.stderr.expect(consumeThrough(endsWith('Error loading transformer: '
+            'I hate these settings!')));
+      }
+      pub.shouldExit(1);
+    });
 }